This Power Pak Handle Assembly for Springer Magrath Stock Prod has a grooved finger guide which allows you to find the switch by feel, even with gloved hands. The rubber switch insulator prevents feedback. Precious metal battery contacts won t corrode and a heavy oil spring assures firm battery contact. Tough, structural-grade plastic case construction, packaged in a protective clamshell. Four high-energy, longer-lasting alkaline batteries included. Shafts in several lengths sold separately.